Disco - alpha mat test by Killebrew
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Description
So what's the big deal on this weird disco picture, other than my typical weirdness?
No postwork. None of the symbols or colorful doodlies were done after the render. It's all "real time" rendering with homemade stuff. I like to do it that way if I can, because my Photoshop postwork skills aren't anything to write home about. It looks better if you can do it all at the time you make the final render when you have my limited skill set.
I finally figured out how to do alpha mats with transparency and transparency falloff and all that jazz, at least as well I have been aiming for.
The bottom right corner shows an exploded view of the alpha mats so you can get an idea how this kind of thing is done if you haven't seen it before. They're nothing more than pictures on a flat plane (in this case, the High Res Square primitave prop that comes with Poser). Transparent sections are mapped out.
I understood the basic idea, but I could never make it work until today.
And that's because Jepe (who makes great stuff, by the way) released a free add-on at Poser Addicts to a product that will be coming out in a day or so. But the add-on already works great as a stand alone. It's a bunch of cool props that have transparent parts. I've used his "Jepe's Fire" for a while now. If you've bought that in the past, you've know what I was aiming for with this one.
I got to examining it in the Material Room in Poser 7, and I thought it might be nice if I actually made a freebie for once, since I'm always using other people's stuff. I don't have enough experience to make much of anything yet.
With that as my goal, I started looking into reproducing the transparent alpha prop idea without using any of Jepe's files - try and make something that anyone with an out-of-the-box version of Poser can do. The picture above is the end result.
Basically you go into Photoshop, use your favorite brushes and make a picture, make another picture to tell Poser where the transparent parts of the first picture should be, and then assign those pictures to a prop in the Material Room.
If there's a tutorial out there that shows how to do this, I haven't accidentally stumbled across it yet. There's got to be one, because it's really not that hard once you do it, and plenty of people have made great products using it.
So I may look into making a PDF tutorial for Renderosity of how to make your own alpha mat props, if I can figure out the tutorial upload process here and it hasn't been done to death already.
Comments (10)
lwperkins
The only tricky thing about making alpha maps for Poser transparencies (even for lashes, hiding part of clothes and whatnot), is to be sure to click "d" to set the default black/white on your palette in Photoshop--it's gotta be dead black, all the way, or you'll get ghosting..your own eyeballs aren't enough to get the real black black;) I think this is a hoot just as an image--a 50's timetravelling disco wizard visits the pyramids! And the colors rock!
Killebrew
Thanks! What I did was make a picture of the design I wanted using some Photoshop brushes - then just desaturated the picture to take out the color, then adjusted the brightness way up to make sure the whites were more solid. At first nothing was rendering very crisp when I went for the final render. By cranking up the brightness in Photoshop, it made sure that the whole things wasn't partly transparent, just the black areas and varying levels of grey. Don't know if that's the right technique, but it seemed to work fairly well. I did notice, though, that if the figure intersects the alpha mat, you can tell that there's something there. So I'm not 100% to the full transparency yet. And it also seems to work best against a darker background.
wrpspeed
neat pic. uesd alpha planes before.
uncollared
cool pose and effects, nicly done
jac204
You're way ahead of me. I can't even get grass to show up on a lawn. Great job. Thanks for sharing your ideas.
Killebrew
It's easier to do alpha planes in Vue, if you're trying to figure it out on your own. Poser is a little less intuative to me. All those nodes in the material room scare me off.
aubedo
nice work... nice, if you can use alpha-maps... maybe it's a nag in my daz studio installation - but it's not using the alpha-channel, not from psd, not from tga, not from tiff nor png... everytime i've to save the transparency-mask as extra jpg... same effect in external 3delight renderer ( version 8.01)...
mgtcs
Wonderful composition, wow...gorgeous lighting my friend, excellent work, loved it!
crender
Marvelous work!!!
Radar_rad-dude
A very sensational and wonderful experiement and result! Your learning curve is way ahead of me on transparencies. I read lwperkins not on clicking 'd' when setting the palette, but I don't know where that switch is. I have PhotoShop7. I wonder if that is a feature on the newer versions? At any rate, this image really "ROCKS"!!!! Great job! A very big delight to the eyes!!!